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From:   Vincent Guittot <vincent.guittot@linaro.org>
To:     mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com,
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        youssefesmat@chromium.org, joel@joelfernandes.org,
        Vincent Guittot <vincent.guittot@linaro.org>
Subject: [PATCH v8 7/9] sched/core: Support latency priority with sched core
Date:   Thu, 10 Nov 2022 18:50:07 +0100
Message-Id: <20221110175009.18458-8-vincent.guittot@linaro.org>
In-Reply-To: <20221110175009.18458-1-vincent.guittot@linaro.org>
References: <20221110175009.18458-1-vincent.guittot@linaro.org>
Precedence: bulk

Take into account wakeup_latency_gran() when ordering the cfs threads.

Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
---
 kernel/sched/fair.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 9583936ce30c..a7372f80b1ea 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -11439,6 +11439,9 @@ bool cfs_prio_less(struct task_struct *a, struct task_struct *b, bool in_fi)
 	delta = (s64)(sea->vruntime - seb->vruntime) +
 		(s64)(cfs_rqb->min_vruntime_fi - cfs_rqa->min_vruntime_fi);
 
+	/* Take into account latency prio */
+	delta -= wakeup_latency_gran(sea, seb);
+
 	return delta > 0;
 }
 #else
-- 
2.17.1